<template>
<h2>App父级组件</h2>
<button @click="isShow = !isShow">切换显示</button>
<hr/>
<Child v-if="isShow"/>
</template>
<script lang="ts">
import Child from './components/Child.vue'
import { defineComponent, ref } from 'vue'
export default defineComponent ({
    name: 'App',
    components: {
        Child
    },
    setup() {
        const isShow = ref(true)
        return {
            isShow
        }
    }
})
</script>
<style>
</style>